TERMINAL, BASE STATION, AND COMMUNICATION METHOD

Abstract

 A terminal includes: a control unit configured to expect that, in non-contiguous frequency resources formed by a plurality of contiguous frequency resources, retransmission control processes are to be controlled for each of the non-contiguous frequency resources, and expect that numbers for the retransmission control processes are to be defined in the non-contiguous frequency resources or expect that numbers that are associated with the contiguous frequency resources are to be defined in the non-contiguous frequency resources; and a transmission unit configured to transmit terminal capability including a maximum number of the retransmission control processes in the non-contiguous frequency resources to a base station.

Description

TECHNICAL FIELD

[0001] The present invention relates to a terminal, a base station, and a communication method in a wireless communication system.

BACKGROUND ART

[0002] In 3GPP (registered trademark) (3rd Generation Partnership Project), in order to realize further larger system capacity, further faster data transmission speed, further lower latency in a wireless communication section, etc., a wireless communication method called "5G" or "NR (New Radio)" is being discussed (hereinafter, the wireless communication method is referred to as "NR"). In 5G, various wireless technologies and network architectures are being discussed to satisfy the requirements of a radio link delay of 1 ms or less while achieving throughput of 10 Gbps or more (e.g., Non-Patent Literature 1 and Non-Patent Literature 2).

[0003] In NR, as a continued support from LTE, a carrier aggregation (CA) function using a wide band in order to allocate data resources is supported. In the carrier aggregation function, wideband data resources can be allocated by bundling a plurality of component carriers (CCs).

CITATION LIST

Non-Patent Literature

[0004] 

Non-Patent Literature 1: 3GPP TS 38.300 V17.5.0 (2023-06)

Non-Patent Literature 2: 3GPP TS 38.401 V17.5.0 (2023-06)

SUMMARY OF INVENTION

TECHNICAL PROBLEM

[0005] In the carrier aggregation function, in order to perform more flexible and efficient resource allocation, a method is being discussed in which non-contiguous frequency resources are efficiently configured by aggregating contiguous frequency resources. However, a process related to a transport block has not been specified when configuring non-contiguous frequency resources by aggregating the contiguous frequency resources. For example, a process related to generation and mapping of a transport block has not been specified with respect to a physical channel across a plurality of contiguous frequency resources in non-contiguous frequency resources.

[0006] In view of the above-described points, the present invention has been made to perform transmission and reception of data by using non-contiguous frequency resources in the frequency domain in the wireless communication.

SOLUTION TO PROBLEM

[0007] According to the disclosed technique, a terminal is provided. The terminal includes: a control unit configured to expect that, in non-contiguous frequency resources formed by a plurality of contiguous frequency resources, retransmission control processes are to be controlled for each of the non-contiguous frequency resources, and expect that numbers for the retransmission control processes are to be defined in the non-contiguous frequency resources or expect that numbers that are associated with the contiguous frequency resources are to be defined in the non-contiguous frequency resources; and a transmission unit configured to transmit terminal capability including a maximum number of the retransmission control processes in the non-contiguous frequency resources to a base station.

ADVANTAGEOUS EFFECTS OF INVENTION

[0008] According to the disclosed technique, transmission and reception of data can be performed by using non-contiguous frequency resources in the frequency domain in the wireless communication.

BRIEF DESCRIPTION OF DRAWINGS

[0009] 

[Fig. 1] is a drawing illustrating a configuration example of a wireless communication system in an embodiment of the present invention.

[Fig. 2] is a drawing illustrating an example (1) of a structure of a virtual CC related to an embodiment of the present invention.

[Fig. 3] is a drawing illustrating an example (2) of a structure of a virtual CC related to an embodiment of the present invention.

[Fig. 4] is a drawing illustrating an example (1) of mapping of transport blocks related to an embodiment of the present invention.

[Fig. 5] is a drawing illustrating a method 1 of mapping of transport blocks related to an embodiment of the present invention.

[Fig. 6] is a drawing illustrating a method 2 of mapping of transport blocks related to an embodiment of the present invention.

[Fig. 7] is a drawing illustrating a method 3 of mapping of transport blocks related to an embodiment of the present invention.

[Fig. 8] is a drawing illustrating an example (2) of mapping of transport blocks related to an embodiment of the present invention.

[Fig. 9] is a drawing illustrating an example of grouping of virtual CCs related to an embodiment of the present invention.

[Fig. 10] is a drawing illustrating an example of a functional structure of a base station 10 in an embodiment of the present invention.

[Fig. 11] is a drawing illustrating an example of a functional configuration of a terminal 20 in an embodiment of the present invention.

[Fig. 12] is a drawing illustrating an example of a hardware structure of the base station 10 or the terminal 20 in an embodiment of the present invention.

[Fig. 13] is a drawing illustrating an example of a structure of a vehicle 2001 in an embodiment of the present invention.

DESCRIPTION OF EMBODIMENTS

[0010] In the following, while referring to the drawings, one or more embodiments of the present invention will be described. It should be noted that the embodiments described below are examples. Embodiments of the present invention are not limited to the following embodiments.

[0011] In operations of a wireless communication system according to an embodiment of the present invention, a conventional technique will be used when it is appropriate. It should be noted that, although the conventional techniques may be the conventional LTE, the conventional techniques are not limited to the conventional LTE. Further, it is assumed that the term "LTE" used in the present specification has, unless otherwise specifically mentioned, a broad meaning including a scheme of LTE-Advanced and a scheme after LTE-Advanced (e.g., NR).

[0012] Furthermore, in one or more embodiments described below, terms that are used in the existing LTE are used, such as SS (Synchronization signal), PSS (Primary SS), SSS (Secondary SS), PBCH (Physical broadcast channel), PRACH (Physical random access channel), PDCCH (Physical Downlink Control Channel), PDSCH (Physical Downlink Shared Channel), PUCCH (Physical Uplink Control Channel), PUSCH (Physical Uplink Shared Channel), etc. The above-described terms are used for the sake of description convenience. Signals, functions, etc., which are similar to the above-described terms, may be referred to as different names. In addition, the above-described terms in NR correspond to NR-SS, NR-PSS, NR-SSS, NR-PBCH, NR-PRACH, etc. However, even when a signal is used for NR, the signal is not required to be referred to as "NR-".

[0013] In addition, in an embodiment of the present invention, the duplex method may be a TDD (Time Division Duplex) method, an FDD (Frequency Division Duplex) method, or any other method (e.g., Flexible Duplex, or the like).

[0014] Further, in an embodiment of the present invention, the expression that a radio parameter, or the like is "configured" may mean that a predetermined value is pre-configured, or may mean that a radio parameter indicated by a base station 10 or a terminal 20 is configured.

[0015] Fig. 1 is a drawing illustrating a configuration example of a wireless communication system according to an embodiment of the present invention. As illustrated in Fig. 1, a wireless communication system according to an embodiment of the present invention includes a base station 10 and a terminal 20. In Fig. 1, a single base station 10 and a single terminal 20 are illustrated as an example, but there may be a plurality of base stations 10 and a plurality of terminals 20.

[0016] The base station 10 is a communication device that provides one or more cells and performs wireless communication with the terminal 20. Physical resources of radio signals may be defined in the time domain and the frequency domain, the time domain may be defined by the number of OFDM (Orthogonal Frequency Division Multiplexing) symbols, and the frequency domain may be defined by the number of sub-carriers or resource blocks. The base station 10 transmits a synchronization signal and system information to the terminal 20. The synchronization signal is, for example, an NR-PSS and/or an NR-SSS. The system information may be transmitted via an NR-PBCH, and may be referred to as broadcast information. The synchronization signal and the system information may be referred to as an SSB (SS/PBCH block). As shown in Fig. 1, the base station 10 transmits a control signal or data in DL (Downlink) to the terminal 20 and receives a control signal or data in UL (Uplink) from the terminal 20. The base station 10 and terminal 20 are capable of transmitting and receiving a signal by performing the beamforming. Further, the base station 10 and the terminal 20 can both apply MIMO (Multiple Input Multiple Output) communication to DL or UL. Further, the base station 10 and the terminal 20 may both perform communications via a secondary cell (SCell: Secondary Cell) and a primary cell (PCell: Primary Cell) using CA (Carrier Aggregation). In addition, the terminal 20 may perform communications via a primary cell of the base station 10 and a primary secondary cell group cell (PSCell: Primary SCG Cell) of another base station 10 using DC (Dual Connectivity).

[0017] The terminal 20 may be a communication apparatus that includes a wireless communication function such as a smartphone, a mobile phone, a tablet, a wearable terminal, a communication module for M2M (Machine-to-Machine), or the like. As shown in Fig. 1, the terminal 20 uses various communication services provided by the wireless communication system by receiving control signals or data in DL from the base station 10 and transmitting control signals or data in UL to the base station 10. In addition, the terminal 20 receives various reference signals transmitted from the base station 10 and performs measurement of the propagation path quality based on the reception result of the reference signals.

[0018] In addition, in LTE and NR, a carrier aggregation function using a broad band is supported in order to allocate data resources. In the carrier aggregation function, wideband data resources can be allocated by bundling a plurality of component carriers. For example, a bandwidth of 100 MHz can be used by bundling a plurality of bandwidths of 20 MHz.

[0019] In the conventional carrier aggregation function, there has been a problem that the resource allocation overhead is large due to the necessity of scheduling data resources for each of the bundled plurality of component carriers.

[0020] Accordingly, a method of performing resource allocation by using scheduling units whose granularity is different from that of component carriers and a terminal that performs resource allocation by using scheduling units whose granularity is different from that of component carriers will be described.

[0021] A framework for performing scheduling or aggregation with a granularity that is different from that of component carriers is defined as a frequency fragmentation. It is to be noted that "component carriers" may mean a set of frequency resources corresponding to the conventional scheduling units (that is, actual CCs described below), or a set of frequency resources in the frequency fragmentation (that is, virtual CCs described below) may be referred to as "component carriers".

[0022] In addition, in the carrier aggregation, performing aggregation with a granularity that is different from that of the component carriers is defined as non-contiguous carrier aggregation.

[0023] In addition, in the carrier aggregation (non-contiguous carrier aggregation), performing scheduling with a granularity that is different from that of the component carriers is defined as non-contiguous scheduling.

[0024] The above-described granularity that is different from that of the component carriers may be a virtual CC unit, a BWP (Bandwidth Part) unit, a PRB (Physical Resource block), or a PRB set unit. The virtual CC means a set of carriers in which all or a part of frequency resources included in each component carrier from among a plurality of component carriers are bundled. For example, the virtual CC may be expected to be composed of a plurality of BWPs.

[0025] Fig. 2 is a first drawing illustrating an example of a structure of a virtual CC related to an embodiment of the present invention. The virtual CC#i illustrated in Fig. 2 is a set of carriers in which BWP#a and BWP#b included in respective component carriers from among a plurality of component carriers (CC#0 and CC#1) are bundled.

[0026] In addition, the virtual CC may be expected to be composed of a plurality of PRBs or a PRB set.

[0027] Fig. 3 is a second drawing illustrating an example of a structure of a virtual CC related to an embodiment of the present invention. The virtual CC#i illustrated in Fig. 3 is a set of carriers in which a plurality of PRBs included in respective component carriers from among a plurality of component carriers (CC#0 and CC#1) are bundled. It is to be noted that the plurality of PRBs or a PRB set may be included in one or more BWPs.

[0028] Hereinafter, a CC before bundling is referred to as an actual CC, and a CC after bundling is referred to as a virtual CC or a nominal CC. It is to be noted that the names are not limited to those described above. In addition, an actual CC may be a certain frequency resource unit and is not required to be defined or configured as a CC. The virtual CC may be defined or configured as a CC.

[0029] In addition, a virtual CC may be used in the same manner as the conventional single CC in, for example, channel mapping, scheduling, retransmission control (HARQ, Hybrid Automatic Repeat request), configuration processing, or the like.

[0030] In addition, an actual CC may be replaced with contiguous frequency resources and a virtual CC may be replaced with non-contiguous frequency resources.

[0031]  The terminal 20 may transmit the terminal capability information indicating the structure of a virtual CC to the base station 10. The terminal capability information indicating the structure of a virtual CC may be, for example, information indicating that a virtual CC is composed of a plurality of BWPs, or may be information indicating that a virtual CC is composed of a plurality of PRBs.

[0032] In addition, the terminal capability information indicating the structure of a virtual CC may be information indicating that a virtual CC composed of a plurality of BWPs and a virtual CC composed of a plurality of PRBs are supported.

[0033] The terminal 20 may transmit the terminal capability information indicating the structure of a virtual CC to the base station 10. The terminal capability information indicating the structure of a virtual CC may be, for example, information indicating that a virtual CC is composed of a plurality of BWPs, or may be information indicating that a virtual CC is composed of a plurality of PRBs.

[0034] In addition, the terminal capability information indicating the structure of a virtual CC may be information indicating that a virtual CC composed of a plurality of BWPs and a virtual CC composed of a plurality of PRBs are supported.

[0035] In addition, the terminal 20 may expect that an index for identifying each virtual CC is to be configured by the base station 10 by using RRC. In addition, the terminal 20 may expect that the index for identifying each virtual CC is to be either the smallest value (for example, i = 0 in Fig. 2 or Fig. 3) or the largest value (for example, i = 1 in Fig. 2 or Fig. 3) of the component carrier index.

[0036] The terminal 20 may expect that the scheduling unit for the non-contiguous scheduling is to be indicated by: (i) a virtual CC index; (ii) a plurality of component carrier indexes + a plurality of BWP indexes; (iii) a plurality of component carrier indexes + a plurality of indexes for PRBs or a PRB set; (iv) a plurality of component carrier indexes + a plurality of BWP indexes + a plurality of indexes for PRBs or a PRB set; or the like.

[0037]  For example, the terminal 20 may assume that the resource unit of carrier aggregation is to be a virtual CC, a BWP, a PRB, or a PRB set.

[0038] According to the above-described operation, the resource allocation using a scheduling unit whose granularity is different from that of the component carriers can be implemented.

(Embodiment)

[0039] In an embodiment of the present invention, a process related to a transport block and a process related to retransmission control when using non-contiguous frequency resources in the frequency domain in the wireless communication will be described.

[0040] In an embodiment of the present invention, in a case where a virtual CC is composed of one or more actual CCs, with respect to the downlink data channel (PDSCH) or the uplink data channel (PUSCH) across a plurality of actual CCs, reception of PDSCH or transmission of PUSCH is performed by the terminal 20 where a transport block (TB) is generated and mapped in the PDSCH or in the PUSCH. Here, "PDSCH across a plurality of actual CCs" means that the frequency resources used for PDSCH are included in a part of or all of the plurality of actual CCs. In addition, operations may be different between reception of PDSCH and transmission of PUSCH.

[0041] In addition, "TB" may be replaced with Code Block (CB) or Code Block Group (CBG), and a CB-level or CBG-level of transmission or retransmission and feedback information (HARQ feedback) transmission may be performed in the virtual CC.

(Embodiment 1)

[0042] In embodiment 1, a TB is generated and mapped for each actual CC.

(Embodiment 1a) TBS determination

[0043] The base station 10 and the terminal 20 may determine the TB size (Transport Block Size (TBS)), based on available resource elements (REs), to-be-transmitted DMRSs (DeModulation Reference Signals), and the overhead in each of the actual CCs. Here, the overhead may include, for example, a channel state information reference signal (CSI (Channel State Information) - RS (Reference Signal)), a phase tracking reference signal (PT (Phase Tracking) - RS), or the like, and may be determined based on the RRC parameter.

[0044] In addition, the base station 10 and the terminal 20 may apply common modulation and coding schemes (MCS) to all of the actual CCs, or may apply a different MCS for each of the actual CCs.

(Embodiment 1b) Mapping

[0045] The base station 10 and the terminal 20 map the TB that is generated for each actual CC to each actual CC.

[0046] The mapping order may be an order in which the mapping in the time direction is performed after the mapping in the frequency direction, or may be an order in which the mapping in the frequency direction is performed after the mapping in the time direction.

[0047] Fig. 4 is a drawing illustrating an example (1) of mapping of transport blocks related to an embodiment of the present invention. In Fig. 4, a virtual CC is composed of actual CC#0, actual CC#1, and actual CC#2, and, in PDSCH across actual CC#0 and actual CC#1, TB#0 is generated and mapped to actual CC#0 and TB#1 is generated and mapped to actual CC#1. The mapping order is an order in which mapping is performed in the time direction after mapping is performed in the frequency direction.

(Embodiment 1c) HARQ process management

[0048] In the virtual CC, the retransmission control process (HARQ process) may be defined and managed for each of the actual CCs, or may be defined and managed across the actual CCs.

[0049] The retransmission control process number (HARQ process number) for a TB in each of the actual CCs may be a common value for all of the actual CCs. In this case, the base station 10 indicates, to the terminal 20, the common value by including the common value in downlink control information (DCI). Alternatively, the retransmission control process number (HARQ process number) for a TB in each of the actual CCs may be a different value for each of the actual CCs. In this case, for example, the base station 10 performs indication to the terminal 20 by including the retransmission control process number for each of the actual CCs in DCI. The indication is not required to be an indication by DCI, and may be an indication by RRC or MAC CE.

[0050] The NDI (New Data Indicator) of a TB in each of the actual CCs may be a common value for all of the actual CCs. In this case, the base station 10 indicates, to the terminal 20, the common value by including the common value in DCI. Alternatively, the NDI of a TB in each of the actual CCs may be a different value for each of the actual CCs. In this case, for example, the base station 10 performs indication to the terminal 20 by including the NDI for each of the actual CCs in DCI.

[0051] The RV (Redundancy Version) of a TB in each of the actual CCs may be a common value for all of the actual CCs. In this case, the base station 10 indicates, to the terminal 20, the common value by including the common value in DCI. Alternatively, the RV of a TB in each of the actual CCs may be a different value for each of the actual CCs. In this case, for example, the base station 10 performs indication to the terminal 20 by including the RV for each of the actual CCs in DCI.

[0052] In a specific actual CC, retransmission of a TB in another actual CC included in the same virtual CC may be performed. In this case, for example, the base station 10 may perform indication to the terminal 20 by including, in DCI, information related to the actual CC to be retransmitted (for example, information indicating the actual CC that is originally used for transmission of the TB that is going to be retransmitted).

[0053] In the virtual CC, the retransmission control process is defined and managed across the actual CCs, the maximum number of retransmission control processes may be a sum of the maximum number of retransmission control processes in each of the actual CCs.

(Embodiment 1d) Feedback

[0054] With respect to the feedback related to PDSCH, generation and reporting of feedback information (HARQ-ACK) may be performed for each TB in each of the actual CCs.

[0055] With respect to the indication information for DCI related to determination of the number of HARQ-ACK bits (for example, DAI (Downlink Assignment Index)), the indication information may be transmitted for each TB in each of the actual CCs, or the indication information including a single value for TBs in all of the actual CCs may be transmitted.

[0056] The timing and the resource related to reporting of the feedback information may be the same for TBs in all of the actual CCs, or may be different for each TB in each of the actual CCs.

[0057] Generation and reporting of single feedback information (HARQ-ACK) may be performed based on the decoding result for each TB in each of the actual CCs. For example, ACK is indicated if all of the decoding results are successful, and NACK is indicated if there is even one failure in the decoding results.

[0058] In a case where PUCCH groups are different between actual CCs, generation and reporting of feedback information may be performed for each of the PUCCH groups, or generation and reporting of feedback information may be performed for a specific PUCCH group. Here, the specific PUCCH group may be, for example, a PUCCH group corresponding to the smallest or the largest actual CC index for PDSCH, or a PUCCH group corresponding to an actual CC index related to the PDSCH scheduling PDCCH.

[0059] According to the above-described embodiment 1, generation and mapping of a transport block can be performed when using non-contiguous frequency resources in the frequency domain in the wireless communication. In addition, in embodiment 1, an operation related to a TB is performed in a closed manner within a single actual CC, and thus, the increased complexity of configuration of the terminal 20 can be avoided.

(Embodiment 2)

[0060] In embodiment 2, a TB is generated and mapped across actual CCs for each PDSCH or PUSCH.

(Embodiment 2a) TBS determination

[0061] The base station 10 and the terminal 20 may determine the TB size (Transport Block Size (TBS)), based on available resource elements (REs), to-be-transmitted DMRSs (DeModulation Reference Signals), and the overhead with respect to the entire PDSCH or PUSCH. Here, the overhead may include, for example, a channel state information reference signal (CSI (Channel State Information) - RS (Reference Signal)), a phase tracking reference signal (PT (Phase Tracking) - RS), or the like, and may be determined based on the RRC parameter.

[0062] In addition, the base station 10 and the terminal 20 may apply common modulation and coding schemes (MCS) with respect to the entire PDSCH or PUSCH.

[0063] In addition, a plurality of TBs may be generated with respect to PDSCH or PUSCH. The generation of a plurality of TBs may be performed only in a case where a specific condition is satisfied. For example, the generation of a plurality of TBs can be performed only if the TBS for a case where only one TB is generated would exceed a specific size, and the generation of a plurality of TBs cannot be performed in a case where the TBS would not exceed the specific size.

(Embodiment 2b) Mapping

[0064] The base station 10 and the terminal 20 map the TB that is generated for the entire PDSCH or PUSCH across to a plurality of actual CCs. It is to be noted that, in a case where a plurality of TBs are generated, the mapping of the plurality of TBs may be performed in the order of time direction in PDSCH or PUSCH.

[0065] With respect to the mapping order, three methods described below can be used.

[0066] (Method 1) The mapping is performed in the order of frequency direction in an actual CC, moving to the subsequent actual CC, and in the order of time direction.

[0067] (Method 2) The mapping is performed in the order of frequency direction and then in the order of time direction in an actual CC, moving to the subsequent actual CC.

[0068] (Method 3) The mapping is performed in the order of time direction and then in the order of frequency direction in an actual CC, moving to the subsequent actual CC.

[0069] Fig. 5, Fig. 6, and Fig. 7 are drawings illustrating the corresponding method 1, method 2, and method 3 of the mapping of transport blocks related to an embodiment of the present invention. In Fig. 5, Fig. 6, and Fig. 7, a virtual CC is composed of actual CC#0, actual CC#1, and actual CC#2, and, TB#0 is generated and mapped for PDSCH located across actual CC#0 and actual CC#1.

[0070] In Fig. 5, based on the method 1, an operation is repeatedly performed in which: mapping is performed in the order of frequency direction in actual CC#0; then, mapping is performed in the order of frequency direction in actual CC#1; and lastly, mapping is performed in the order of time direction.

[0071] In Fig. 6, based on the method 2, an operation is repeatedly performed in which: mapping is performed in the order of frequency direction and in the order of time direction in actual CC#0; then, mapping is performed in the order of frequency direction and in the order of time direction in actual CC#1.

[0072] In Fig. 7, based on the method 3, after an operation is repeatedly performed in which mapping is performed in the order of time direction and in the order of time direction in actual CC#0, an operation is repeatedly performed in which mapping is performed in the order of time direction and in the order of frequency direction in the subsequent actual CC#1.

(Embodiment 2c) HARQ process management

[0073] In the virtual CC, the retransmission control process (HARQ process) may be defined and managed for each of the actual CCs, or may be defined and managed across the actual CCs.

[0074] In a case where the retransmission control process is defined and managed for each of the actual CCs, the retransmission control process of PDSCH or PUSCH located across a plurality of actual CCs may be a retransmission control process corresponding to the smallest or largest actual CC index of PDSCH or PUSCH, may be a retransmission control process corresponding to an actual CC index related to the PDSCH or PUSCH scheduling PDCCH (scheduling-PDCCH), or may be a retransmission control process corresponding to the actual CC index that is configured or indicated via at least one of RRC, MAC CE, or DCI.

[0075] In a specific actual CC, retransmission of a TB in another actual CC included in the same virtual CC may be performed. In this case, the base station 10 may perform indication to the terminal 20 by including, in DCI, information related to the actual CC used for retransmission (for example, information indicating the actual CC that is originally used for transmission of the TB that is going to be retransmitted).

[0076] In a case where a plurality of TBs are generated and mapped, the base station 10 may indicate, to the terminal 20, the retransmission control process number (HARQ process number (HPN)) for each of the TBs by using DCI. Alternatively, the base station 10 may indicate, to the terminal 20, only the HPN for the first TB (1st TB) by using DCI, and the HPNs for the second TB (2nd TB) and the subsequent TBs may be obtained by incrementing the indicated HPN in a one-by-one manner.

[0077] In a case where a plurality of TBs are generated and mapped, the base station 10 may indicate, to the terminal 20, the NDI (New Data Indicator) for each of the TBs by using DCI. Alternatively, the base station 10 may indicate, to the terminal 20, the NDI that is common to all of the TBs.

[0078] In a case where a plurality of TBs are generated and mapped, the base station 10 may indicate, to the terminal 20, the RV (Redundancy Version) for each of the TBs by using DCI. Alternatively, the base station 10 may indicate, to the terminal 20, the RV that is common to all of the TBs.

[0079] In a case where the retransmission control process is defined and managed across the actual CCs, the maximum number of retransmission control processes may be a sum of the maximum number of retransmission control processes in each of the actual CCs.

(Embodiment 2d) Feedback

[0080] With respect to the feedback related to PDSCH, generation and reporting of feedback information (HARQ-ACK) may be performed for a TB that is generated for the entire PDSCH or PUSCH.

[0081] In a case where PUCCH groups are different between actual CCs, generation and reporting of feedback information may be performed for each of the PUCCH groups, or generation and reporting of feedback information may be performed for a specific PUCCH group. Here, the specific PUCCH group may be, for example, a PUCCH group corresponding to the smallest or the largest actual CC index for PDSCH, or a PUCCH group corresponding to an actual CC index related to the PDSCH scheduling PDCCH.

[0082] In a case where a plurality of TBs are generated and mapped, generation and reporting of feedback information (HARQ-ACK) may be performed for each TB. Alternatively, generation and reporting of single feedback information (HARQ-ACK) may be performed based on the decoding result of each TB. For example, ACK is indicated if all of the decoding results are successful, and NACK is indicated if there is even one failure in the decoding results.

[0083] According to the above-described embodiment 2, generation and mapping of a transport block can be performed when using non-contiguous frequency resources in the frequency domain in the wireless communication. In addition, in embodiment 2, an operation in accordance with the flexible and efficient resource allocation can be performed by performing an operation related to TB generation by assuming that the virtual CC is the same as the conventional CC.

(Embodiment 3)

[0084] In Embodiment 3, a TB is generated for a specific actual CC and repetitions of the TB are mapped to the remaining actual CCs.

[0085] Here, the specific actual CC may be an actual CC that has the smallest or the largest actual CC index among the actual CCs of PDSCH or PUSCH or the actual CCs included in the virtual CC, may be an actual CC related to PDCCH for scheduling the PDSCH or PUSCH (scheduling-PDCCH) or may be an actual CC that is configured and/or indicated by the base station 10 (a BS-configured/indicated actual CC).

(Embodiment 3a) TBS determination

[0086] The method that is described in embodiment 1a is applied for the specific actual CC in embodiment 3.

(Embodiment 3b) Mapping

[0087] The method that is described in embodiment 1b is applied for the specific actual CC in embodiment 3.

[0088] With respect to the mapping for the remaining actual CCs, the same information as in the specific actual CC may be copied and repeated.

[0089] Fig. 8 is a drawing illustrating an example (2) of mapping of transport blocks related to an embodiment of the present invention. In Fig. 8, a virtual CC is composed of actual CC#0 and actual CC#1. Here, the resource sizes are the same between actual CC#0 and actual CC#1. With respect to PDSCH that is located across actual CC#0 and actual CC#1, first, generation and mapping of a TB is performed in actual CC#0 (TB#0 Rep.#0). The mapping order is an order in which mapping is performed in the time direction after mapping is performed in the frequency direction. Subsequently, in actual CC#1, mapping is performed by repeating the TB that is generated in actual CC#0 (TB#0 Rep.#1).

[0090] With respect to the mapping for the remaining actual CCs, repetitions in the frequency direction may be used based on a specific RV (Redundancy Version). For example, with respect to the remaining actual CCs, a value of RV that is different from that of RV that is used in the specific actual CC (for example, one (1) is added every time a repetition is performed for the remaining actual CCs) is used.

[0091] In a case where the available resources in the remaining actual CCs is less than the available resources in the specific actual CC, mapping may be performed by repeating only a part of the specific actual CC. Alternatively, mapping of the TB may be performed based on the available resources in the remaining actual CCs and/or on the RV value that is used.

[0092] In a case where the available resources in the remaining actual CCs are greater than the available resources in the specific actual CC, mapping may be performed by repeating the specific actual CC for a plurality of times. Alternatively, mapping of the TB may be performed based on the available resources in the remaining actual CCs and/or on the RV value that is used.

(Embodiment 3c) HARQ process management

[0093] In the virtual CC, the retransmission control process (HARQ process) may be defined and managed for each of the actual CCs, or may be defined and managed across the actual CCs.

[0094] In a specific actual CC, retransmission of a TB in another actual CC included in the same virtual CC may be performed. In this case, for example, the base station 10 may perform indication to the terminal 20 by including, in DCI, information related to the actual CC to be retransmitted.

[0095] In the virtual CC, the retransmission control process is defined and managed across the actual CCs, the maximum number of retransmission control processes may be a sum of the maximum number of retransmission control processes in each of the actual CCs.

(Embodiment 3d) Feedback

[0096] The method that is described in embodiment 1a is applied for the feedback related to PDSCH.

[0097] According to the above-described embodiment 3, generation and mapping of a transport block can be performed when using non-contiguous frequency resources in the frequency domain in the wireless communication. In addition, in embodiment 3, an operation related to generation of a TB, for example, is performed only in an actual CC, and thus, an operation of the terminal is simplified and an operation that is in accordance with the flexible and efficient resource allocation can be performed.

(First modified embodiment)

[0098] Hereinafter, the first modified embodiment that can be applied to embodiment 1, embodiment 2, and embodiment 3 will be described.

[0099] In the first modified embodiment, the sequence used for scrambling PDSCH or PUSCH may be a sequence based on the index related to each actual CC. For example, the formula for calculating the sequence may include an index related to each actual CC.

[0100] Alternatively, the sequence may be a sequence that is based on an index related to a specific actual CC. Here, the specific actual CC may be an actual CC that has the smallest or the largest actual CC index among the actual CCs of PDSCH or PUSCH or the actual CCs included in the virtual CC, may be an actual CC related to PDCCH for scheduling the PDSCH or PUSCH (scheduling-PDCCH), or may be what is configured and/or indicated by the base station 10 (BS-configured/indicated).

[0101] Alternatively, the sequence may be a sequence that is based on an index related to a virtual CC.

(Second modified embodiment)

[0102] The second modified embodiment that can be applied to embodiment 1, embodiment 2, and embodiment 3 will be described.

[0103] In the second modified embodiment, processes and methods described in embodiment 1, embodiment 2, and embodiment 3 may be applied to the device-to-device communication and to the sidelink channel for the device-to-device communication. In other words, the downlink data channel (PDSCH) and the uplink data channel (PUSCH) may be replaced with the device-to-device data channel (PSSCH).

(Third modified embodiment)

[0104] The third modified embodiment that can be applied to embodiment 1, embodiment 2, and embodiment 3 will be described.

[0105] In the third modified embodiment, information indicating which process and method described in embodiment 1, embodiment 2, and embodiment 3 are to be used may be configured in RRC, MAC CE, or DCI and indicated to the terminal 20 by the base station 10, and the switching may be performed.

[0106] According to the above-described embodiment, generation and mapping of a transport block can be performed when using non-contiguous frequency resources in the frequency domain in the wireless communication. In addition, an operation related to a TB is performed in a closed manner within a single actual CC, and thus, the increased complexity of configuration of the terminal 20 can be avoided. In addition, an operation in accordance with the flexible and efficient resource allocation can be performed by performing an operation related to TB generation by assuming that the virtual CC is the same as the conventional CC. In addition, an operation related to generation of a TB is performed only in a specific actual CC, and thus, an operation of the terminal can be simplified and an operation that is in accordance with the flexible and efficient resource allocation can be performed.

(Fourth modified embodiment)

[0107] The fourth modified embodiment that can be applied to embodiment 1, embodiment 2, and embodiment 3 will be described.

[0108] In the fourth modified embodiment, actual CCs included in a certain virtual CC may be grouped into groups, and processing and methods that are applied for actual CCs within a group may be different from the processing and methods that are applied for actual CCs across the groups. Here, the processing and methods are, for example, the processing and methods described in embodiment 1, embodiment 2, and embodiment 3.

[0109] Fig. 9 is a drawing illustrating an example of grouping of virtual CCs related to an embodiment of the present invention. As illustrated in Fig. 9, the virtual CC includes actual CC#0, actual CC#1, actual CC#2, and actual CC#3, actual CC#0 and actual CC#1 are grouped into group #0, and actual CC#2 and actual CC#3 are grouped into group #1.

[0110] Here, with respect to the transmission of data (PDSCH, etc.) within a group, across actual CC#0 and actual CC#1 within group #0 (that is, transmission of data including actual CCs in the same group), for example, the processing and method described in embodiment 2 may be used.

[0111] In addition, with respect to the transmission of data (PDSCH, etc.) across the groups, across actual CC#1 in group #0 and actual CC#2 in group #1 (that is, transmission of data including actual CCs in different groups), for example, the processing and method described in embodiment 1 may be used.

[0112] The above-described grouping may be performed based on a configuration, may be determined based on numerologies (for example, actual CCs with the same SCS belong to the same group), or may be determined based on frequencies (for example, actual CCs in the same frequency band or frequency range (FR) belong to the same group).

(Fifth modified embodiment)

[0113] The fifth modified embodiment that can be applied to embodiment 1, embodiment 2, and embodiment 3 will be described.

[0114] In the fifth modified embodiment, control related to retransmission control (HARQ) may be performed on a per-virtual CC basis.

[0115] (5-1)
The maximum number of retransmission control processes (HARQ processes) may be defined on a per-virtual CC basis, or the terminal capability (UE capability) related to the retransmission control process may be reported from the terminal 20 to the base station 10. The terminal capability includes, for example, information such as the maximum number of retransmission control processes.

[0116] (5-2)
Retransmission control processes may be defined and controlled across the actual CCs. In addition, the following 5-2a to 5-2d may be used.

[0117] (5-2a)
The retransmission control process number (HARQ process number (HPN)) or the index indicating the number may be defined on a per-virtual CC basis. For example, integer values from 0 to 15 may be defined as retransmission control process numbers within a virtual CC. It is to be noted that the maximum value is not limited to 15.

[0118] (5-2b)
The retransmission control process number or the index indicating the number may be defined by being associated with actual CCs. For example, the retransmission control process numbers 0, 1, 2, and 3 associated with actual CC#0 and the retransmission control process numbers 0, 1, 2, and 3 associated with actual CC#1 may be defined. In addition, the following indications may be performed in the transmission and retransmission.

[0119] At the time of initial transmission, an index of the actual CC used for transmission and the retransmission control process number are indicated from the base station 10 to the terminal 20.

[0120] At the time of retransmission, the index of the actual CC and the retransmission control process number at the time of initial transmission are indicated from the base station 10 to the terminal 20.

[0121] In the data transmission across a plurality of actual CCs, an index of a specific actual CC corresponding to a retransmission control process number (for example, the minimum value of the indexes of actual CCs among the plurality of actual CCs) may be indicated from the base station 10 to the terminal 20.

[0122] (5-2c)
A plurality of transmission data sets associated with the same retransmission control process number within the virtual CC may be combined to be decoded. According to the above-described decoding, the decoding result accuracy can be improved.

[0123] (5-2d)
The retransmission control process number for the downlink (DL) semi-persistent (SPS) scheduling and/or the uplink (UL) configured grant (CG) scheduling may be determined based on the retransmission control process configuration for the virtual CC. It is to be noted that "DL SPS" and "UL CG" may be different names as long as names for functions in which transmission or reception is performed by using periodic resources without receiving scheduling information for each transmission or reception.

[0124] (5-3)
An operation related to information indicated by MAC-CE included in a TB may be defined as described in the following 5-3a or 5-3b, for example.

[0125] (5-3a)
The information indicated by MAC-CE included in a TB may be applied to all of the virtual CCs.

[0126] (5-3b)
The information indicated by MAC-CE included in a certain TB may be applied to a specific actual CC.

[0127] (5-3b_1)
The information may be applied to all of the actual CCs used for transmitting the TB.

[0128] (5-3b_2)
The information may be applied to a specific actual CC among the actual CCS used for transmitting the TB. For example, the information may be applied to an actual CC whose index value is the smallest among the actual CCs used for transmitting the TB, may be applied to an actual CC indicated by MAC-CE, or may be applied to an actual CC associated with the retransmission control process number for the TB.

(Sixth modified embodiment)

[0129] The sixth modified embodiment that can be applied to embodiment 1, embodiment 2, and embodiment 3 will be described.

[0130] In the sixth modified embodiment, control related to retransmission control (HARQ) may be performed on a per-actual CC basis.

[0131] (6-1)
The maximum number of retransmission control processes (HARQ processes) may be defined on a per-actual CC basis, or the terminal capability (UE capability) related to the retransmission control process may be reported from the terminal 20 to the base station 10. The terminal capability includes, for example, information such as the maximum number of retransmission control processes.

[0132] (6-2)
Retransmission control processes may be defined and controlled on a per-actual CC basis. In addition, the following 6-2a to 6-2c may be used.

[0133] (6-2a)
The retransmission control process number (HARQ process number (HPN)) or the index indicating the number may be defined on a per-virtual CC basis. For example, integer values from 0 to 15 may be defined as retransmission control process numbers within a virtual CC. It is to be noted that the maximum value is not limited to 15.

[0134] (6-2b)
The retransmission control process number or the index indicating the number may be defined by being associated with actual CCs. For example, the retransmission control process numbers 0, 1, 2, and 3 associated with actual CC#0 and the retransmission control process numbers 0, 1, 2, and 3 associated with actual CC#1 may be defined.

[0135]  In the transmission across a plurality of actual CCs corresponding to a retransmission control process number, a retransmission control process number corresponding to an index of a specific actual CC (for example, the minimum value of the indexes of actual CCs among the plurality of actual CCs, the index of the indicated actual CC, etc.) may be indicated from the base station 10 to the terminal 20.

[0136] (6-2c)
The retransmission control process number for the downlink (DL) semi-persistent (SPS) scheduling and/or the uplink (UL) configured grant (CG) scheduling may be determined based on the retransmission control process configuration for the actual CC. It is to be noted that "DL SPS" and "UL CG" may be different names as long as they are names for functions in which transmission or reception is performed by using periodic resources without receiving scheduling information for each transmission or reception.

[0137] (6-3)
An operation related to information indicated by MAC-CE included in a TB may be defined as described in the following 6-3a or 6-3b, for example.

[0138] (6-3a)
The information indicated by MAC-CE included in a TB may be applied to all of the virtual CCs.

[0139] (6-3b)
The information indicated by MAC-CE included in a TB may be applied to a specific actual CC.

[0140] (6-3b_1)
The information may be applied to all of the actual CCs used for transmitting the TB.

[0141] (6-3b_2)
The information may be applied to a specific actual CC among the actual CCS used for transmitting the TB. For example, the information may be applied to an actual CC whose index value is the smallest among the actual CCs used for transmitting the TB, may be applied to an actual CC indicated by MAC-CE, or may be applied to an actual CC associated with the retransmission control process number for the TB.

[0142] According to the above-described embodiment, transmission and reception of data can be performed by using non-contiguous frequency resources in the frequency domain in the wireless communication. In addition, control related to HARQ control can be efficiently performed.

(Device configuration)

[0143] Next, a functional configuration example of the base station 10 and the terminal 20 for performing the processes and operations described above will be described. The base station 10 and the terminal 20 include functions for implementing the embodiments described above. It should be noted, however, that each of the base stations 10 and the terminal 20 may include only some of the functions in an embodiment.

<Base station 10>

[0144] Fig. 10 is a drawing illustrating an example of a functional structure of a base station 10 according to an embodiment of the present invention. As shown in Fig. 10, the base station 10 includes a transmission unit 110, a reception unit 120, a configuration unit 130, and a control unit 140. The functional configuration illustrated in Fig. 10 is merely an example. Functional divisions and names of functional units may be anything as long as operations according to an embodiment of the present invention can be performed. In addition, the transmission unit 110 and the reception unit 120 may be combined and may be referred to as a communication unit.

[0145] The transmission unit 110 includes a function for generating a signal to be transmitted to the terminal 20 side and transmitting the signal wirelessly. Further, the transmission unit 110 transmits an inter-network-node message to another network node. The reception unit 120 includes a function for receiving various signals transmitted from the terminal 20 and acquiring, for example, information of a higher layer from the received signals. In addition, the transmission unit 110 has a function of transmitting NR-PSS, NR-SSS, NR-PBCH, DL/UL control signals, and the like to the terminal 20. Further, the reception unit 120 receives an inter-network-node message from another network node.

[0146] The configuration unit 130 stores preset information and various configuration information items to be transmitted to the terminal 20. Contents of the configuration information are, for example, information related to non-contiguous frequency resources.

[0147] The control unit 140 performs control related to non-contiguous frequency resources as described in the embodiments. The functional units related to signal transmission in the control unit 140 may be included in the transmission unit 110, and the functional units related to signal reception in the control unit 140 may be included in the reception unit 120.

<Terminal 20>

[0148] Fig. 11 is a drawing illustrating an example of a functional structure of a terminal 20 according to an embodiment of the present invention. As shown in Fig. 11, the terminal 20 includes a transmission unit 210, a reception unit 220, a configuration unit 230, and a control unit 240. The functional configuration illustrated in Fig. 11 is merely an example. Functional divisions and names of functional units may be anything as long as operations according to an embodiment of the present invention can be performed. In addition, the transmission unit 210 and the reception unit 220 may be combined and may be referred to as a communication unit.

[0149] The transmission unit 210 generates a transmission signal from transmission data and transmits the transmission signal wirelessly. The reception unit 220 receives various signals wirelessly and obtains higher layer signals from the received physical layer signals. In addition, the reception unit 220 has a function of receiving NR-PSS, NR-SSS, NR-PBCH, DL/UL/SL control signals, and the like, transmitted from the base station 10. In addition, for example, with respect to the D2D communications, the transmission unit 210 transmits, to another terminal 20, PSCCH (Physical Sidelink Control Channel), PSSCH (Physical Sidelink Shared Channel), PSDCH (Physical Sidelink Discovery Channel), PSBCH (Physical Sidelink Broadcast Channel), etc., and the reception unit 220 receives, from the another terminal 20, PSCCH, PSSCH, PSDCH, PSBCH, etc.

[0150] The configuration unit 230 stores various configuration information items received by the reception unit 220 from the base station 10. In addition, the configuration unit 230 also stores pre-configured configuration information. Contents of the configuration information are, for example, information related to non-contiguous frequency resources.

[0151] The control unit 240 performs control related to non-contiguous frequency resources as described in the embodiments. The functional units related to signal transmission in the control unit 240 may be included in the transmission unit 210, and the functional units related to signal reception in the control unit 240 may be included in the reception unit 220.

(Hardware structure)

[0152] The block diagrams that have been used to describe the above embodiments (Fig. 10 and Fig. 11) show blocks in functional units. These functional blocks (components) may be implemented in arbitrary combinations of at least one of hardware or software. Also, the method for implementing each functional block is not particularly limited. That is, each functional block may be realized by one piece of apparatus that is physically or logically coupled, or may be realized by directly or indirectly connecting two or more physically or logically separate pieces of apparatus (for example, via wire, wireless, or the like) and using these plurality of pieces of apparatus. The functional blocks may be implemented by combining software into the apparatus described above or the plurality of apparatuses described above.

[0153] Functions include judgment, determination, decision, calculation, computation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, resolution, selection, designation, establishment, comparison, assumption, expectation, considering, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating (mapping), assigning, and the like, but function are by no means limited to these. For example, the functional block (component) to implement a function of transmission may be referred to as a transmitting unit or a transmitter. The method for implementing each component is not particularly limited as described above.

[0154] For example, the base station 10, the terminal 20, etc., according to an embodiment of the present disclosure may function as a computer for processing the radio communication method of the present disclosure. Fig. 12 is a diagram to show an example of a hardware structure of the base station 10 and the terminal 20 according to one embodiment. Physically, the above-described base station 10 and terminal 20 may each be formed as a computer apparatus that includes a processor 1001, a memory 1002, a storage 1003, a communication apparatus 1004, an input apparatus 1005, an output apparatus 1006, a bus 1007, and so on.

[0155] Note that in the present disclosure, the words such as an apparatus, a circuit, a device, a section, a unit, and so on can be interchangeably interpreted. The hardware structure of the base station 10 and the terminal 20 may be configured to include one or more of apparatuses shown in the drawings, or may be configured not to include part of apparatuses.

[0156] Each function of the base station 10 and the terminals 20 is implemented, for example, by allowing certain software (programs) to be read on hardware such as the processor 1001 and the memory 1002, and by allowing the processor 1001 to perform calculations to control communication via the communication apparatus 1004 and control at least one of reading or writing of data in the memory 1002 and the storage 1003.

[0157] The processor 1001 controls the whole computer by, for example, running an operating system. The processor 1001 may be configured with a central processing unit (CPU), which includes interfaces with peripheral apparatus, control apparatus, computing apparatus, a register, and so on. For example, the above-described control unit 140, control unit 240, and so on may be implemented by the processor 1001.

[0158] Furthermore, the processor 1001 reads programs (program codes), software modules, data, or the like, from at least one of the storage 1003 or the communication apparatus 1004, into the memory 1002, and executes various processes according to these. As for the programs, programs to allow computers to execute at least part of the operations of the above-described embodiments are used. For example, the control unit 140 of the base station 10 illustrated in Fig. 10 may be implemented by control programs that are stored in the memory 1002 and that operate on the processor 1001. In addition, for example, the control unit 240 of the terminal 20 illustrated in Fig. 11 may be implemented by control programs that are stored in the memory 1002 and that operate on the processor 1001. The various processes have been described to be performed by a single processor 1001. However, the processes may be performed by two or more processors 1001 simultaneously or sequentially. The processor 1001 may be implemented by one or more chips. It should be noted that the program may be transmitted from a network via a telecommunication line.

[0159] The memory 1002 is a computer-readable recording medium, and may be constituted with, for example, at least one of a Read Only Memory (ROM), an Erasable Programmable ROM (EPROM), an Electrically Erasable Programmable ROM (EEPROM), a Random Access Memory (RAM), or other appropriate storage media. The memory 1002 may be referred to as a "register," a "cache," a "main memory (primary storage apparatus)" and so on. The memory 1002 can store executable programs (program codes), software modules, and the like for implementing the communication method according to one embodiment of the present disclosure.

[0160] The storage 1003 is a computer-readable recording medium, and may be constituted with, for example, at least one of a flexible disk, a floppy (registered trademark) disk, a magneto-optical disk (for example, a compact disc (Compact Disc ROM (CD-ROM) and so on), a digital versatile disc, a Blu-ray (registered trademark) disk), a removable disk, a hard disk drive, a smart card, a flash memory device (for example, a card, a stick, and a key drive), a magnetic stripe, a database, a server, or other appropriate storage media. The above recording medium may be a database including the memory 1002 and/or the storage 1003, a server, or any other appropriate medium.

[0161] The communication apparatus 1004 is hardware (transmitting/receiving device) for allowing inter-computer communication via at least one of wired or wireless networks, and may be referred to as, for example, a "network device," a "network controller," a "network card," a "communication module," and so on. The communication apparatus 1004 may be configured to include a high frequency switch, a duplexer, a filter, a frequency synthesizer, and so on in order to realize, for example, at least one of frequency division duplex (FDD) or time division duplex (TDD). For example, the transmitting/receiving antenna, the amplifier unit, the transmitting/receiving unit, the transmission line interface, and the like, may be implemented by the communication apparatus 1004. The transmitting/receiving unit may be physically or logically divided into a transmitting unit and a receiving unit.

[0162] The input apparatus 1005 is an input device that receives input from the outside (for example, a keyboard, a mouse, a microphone, a switch, a button, a sensor, and so on). The output apparatus 1006 is an output device that outputs something to the outside (for example, a display, a speaker, an LED lamp). Note that the input apparatus 1005 and the output apparatus 1006 may be provided in an integrated structure (for example, a touch panel).

[0163] Furthermore, these types of apparatus, including the processor 1001, the memory 1002, and others, are connected by a bus 1007 for communicating information. The bus 1007 may be formed with a single bus, or may be formed with buses that vary between pieces of apparatus.

[0164] Also, the base station 10 and the terminals 20 may be structured to include hardware such as a microprocessor, a digital signal processor (DSP), an Application Specific Integrated Circuit (ASIC), a Programmable Logic Device (PLD), a Field Programmable Gate Array (FPGA), and so on, and part or all of the functional blocks may be implemented by the hardware. For example, the processor 1001 may be implemented with at least one of these pieces of hardware.

[0165] Fig. 13 shows an example of a configuration of a vehicle 2001. As shown in Fig. 13, the vehicle 2001 includes a drive unit 2002, a steering unit 2003, an accelerator pedal 2004, a brake pedal 2005, a shift lever 2006, a front wheel 2007, a rear wheel 2008, an axle 2009, an electronic control unit 2010, various sensors 2021-2029, an information service unit 2012, and a communication module 2013. The aspects/embodiments described in the present disclosure may be applied to a communication device mounted in the vehicle 2001, and may be applied to, for example, the communication module 2013.

[0166] The drive unit 2002 may include, for example, an engine, a motor, and a hybrid of an engine and a motor. The steering unit 2003 includes at least a steering wheel and is configured to steer at least one of the front wheels or the rear wheels, based on the operation of the steering wheel operated by the user.

[0167] The electronic control unit 2010 includes a microprocessor 2031, a memory (ROM, RAM) 2032, and a communication port (IO port) 2033. The electronic control unit 2010 receives signals from the various sensors 2021-2029 provided in the vehicle 2001. The electronic control unit 2010 may be referred to as an ECU (Electronic control unit).

[0168] The signals from the various sensors 2021 to 2029 include a current signal from a current sensor 2021 that senses the current of the motor, a front or rear wheel rotation signal acquired by a revolution sensor 2022, a front or rear wheel pneumatic signal acquired by a pneumatic sensor 2023, a vehicle speed signal acquired by a vehicle speed sensor 2024, an acceleration signal acquired by an acceleration sensor 2025, a stepped-on accelerator pedal signal acquired by an accelerator pedal sensor 2029, a stepped-on brake pedal signal acquired by a brake pedal sensor 2026, an operation signal of a shift lever acquired by a shift lever sensor 2027, and a detection signal, acquired by an object detection sensor 2028, for detecting an obstacle, a vehicle, a pedestrian, and the like.

[0169] The information service unit 2012 includes various devices for providing (outputting) various kinds of information such as driving information, traffic information, and entertainment information, including a car navigation system, an audio system, a speaker, a television, and a radio, and one or more ECUs controlling these devices. The information service unit 2012 provides various types of multimedia information and multimedia services to the occupants of the vehicle 2001 by using information obtained from the external device through the communication module 2013 or the like. The information service unit 2012 may include an input device (for example, a keyboard, a mouse, a microphone, a switch, a button, a sensor, a touch panel, and the like) for receiving input from the outside, or may include an output device (for example, a display, a speaker, an LED lamp, a touch panel, and the like) for implementing output to the outside.

[0170] A driving support system unit 2030 includes: various devices for providing functions of preventing accidents and reducing driver's operating loads such as a millimeter wave radar, a LiDAR (Light Detection and Ranging), a camera, a positioning locator (e.g., GNSS, etc.), map information (e.g., high definition (HD) map, autonomous vehicle (AV) map, etc.), a gyro system (e.g., IMU (Inertial Measurement Unit), INS (Inertial Navigation System), etc.), an AI (Artificial Intelligence) chip, an AI processor; and one or more ECUs controlling these devices. In addition, the driving support system unit 2030 transmits and receives various types of information via the communication module 2013 to realize a driving support function or an autonomous driving function.

[0171] The communication module 2013 can communicate with the microprocessor 2031 and components of the vehicle 2001 via a communication port. For example, the communication module 2013 transmits and receives data via a communication port 2033, to and from a drive unit 2002, a steering unit 2003, an accelerator pedal 2004, a brake pedal 2005, a shift lever 2006, front wheels 2007, rear wheels 2008, an axle 2009, a microprocessor 2031 and a memory (ROM, RAM) 2032 in the electronic control unit 2010, and sensors 2021 to 2029 provided in the vehicle 2001.

[0172] The communication module 2013 is a communication device that can be controlled by the microprocessor 2031 of the electronic control unit 2010 and that is capable of communicating with external devices. For example, various kinds of information are transmitted to and received from external devices through radio communication. The communication module 2013 may be internal to or external to the electronic control unit 2010. The external devices may include, for example, a base station, a mobile station, or the like.

[0173] The communication module 2013 may transmit at least one of signals from the various sensors 2021 to 2028 described above input to the electronic control unit 2010, information obtained based on the signals, and information based on an input from the outside (a user) obtained via the information service unit 2012, to the external apparatus via radio communication. The electronic control unit 2010, the various sensors 2021 to 2028, the information service unit 2012, and the like may be referred to as input units that receive input. For example, the PUSCH transmitted by the communication module 2013 may include information based on the input.

[0174] The communication module 2013 receives various types of information (traffic information, signal information, inter-vehicle information, etc.) transmitted from the external devices and displays the received information on the information service unit 2012 provided in the vehicle 2001. The information service unit 2012 may be referred to as an output unit that outputs information (for example, outputs information to devices, such as a display, a speaker, or the like, based on the PDSCH received by the communication module 2013 (or data/information decoded from the PDSCH)). In addition, the communication module 2013 stores the various types of information received from the external devices in the memory 2032 available to the microprocessor 2031. Based on the information stored in the memory 2032, the microprocessor 2031 may control the drive unit 2002, the steering unit 2003, the accelerator pedal 2004, the brake pedal 2005, the shift lever 2006, the front wheel 2007, the rear wheel 2008, the axle 2009, the sensors 2021-2029, etc., mounted in the vehicle 2001.

(Embodiment summary)

[0175] As described above, according to an embodiment of the present invention, a terminal is provided. The terminal includes: a control unit configured to expect that, in non-contiguous frequency resources formed by a plurality of contiguous frequency resources, retransmission control processes are to be controlled for each of the non-contiguous frequency resources, and expect that numbers for the retransmission control processes are to be defined in the non-contiguous frequency resources or expect that numbers that are associated with the contiguous frequency resources are to be defined in the non-contiguous frequency resources; and a transmission unit configured to transmit terminal capability including a maximum number of the retransmission control processes in the non-contiguous frequency resources to a base station.

[0176]  According to the above-described configuration, transmission and reception of data can be performed by using non-contiguous frequency resources in the frequency domain in the wireless communication. In addition, control related to HARQ control can be efficiently performed.

[0177] In addition, according to an embodiment of the present invention, a terminal is provided. The terminal includes: a control unit configured to expect that, in non-contiguous frequency resources formed by a plurality of contiguous frequency resources, retransmission control processes are to be controlled for each of the contiguous frequency resources, and expect that numbers for the retransmission control processes are to be defined in the non-contiguous frequency resources or expect that numbers that are associated with the contiguous frequency resources are to be defined in the non-contiguous frequency resources; and a transmission unit configured to transmit terminal capability including a maximum number of the retransmission control processes in the contiguous frequency resources to a base station.

[0178] According to the above-described configuration, transmission and reception of data can be performed by using non-contiguous frequency resources in the frequency domain in the wireless communication. In addition, control related to HARQ control can be efficiently performed.

[0179] The terminal may further include: a reception unit configured to receive a minimum value of indexes of the plurality of contiguous frequency resources used in the data transmission corresponding to the retransmission control process from the base station.

[0180] According to the above-described configuration, transmission and reception of data can be performed by using non-contiguous frequency resources in the frequency domain in the wireless communication. In addition, control related to HARQ control can be efficiently performed.

[0181] In addition, according to an embodiment of the present invention, a terminal is provided. The terminal includes: a control unit configured to, in non-contiguous frequency resources formed by a plurality of contiguous frequency resources, group a plurality of the contiguous frequency resources into a plurality of groups; and a transmission unit configured to perform data transmissions by using different methods between data transmission using the plurality of the contiguous frequency resources within a group and data transmission using the contiguous frequency resources in a plurality of different groups.

[0182] According to the above-described configuration, transmission and reception of data can be performed by using non-contiguous frequency resources in the frequency domain in the wireless communication.

[0183] In addition, according to an embodiment of the present invention, a base station is provided. The base station includes: a control unit configured to expect that, in non-contiguous frequency resources formed by a plurality of contiguous frequency resources, retransmission control processes are to be controlled for each of the non-contiguous frequency resources, and expect that numbers for the retransmission control processes are to be defined in the non-contiguous frequency resources or expect that numbers that are associated with the contiguous frequency resources are to be defined in the non-contiguous frequency resources; and a reception unit configured to receive terminal capability including a maximum number of the retransmission control processes in the non-contiguous frequency resources from a terminal.

[0184] According to the above-described configuration, transmission and reception of data can be performed by using non-contiguous frequency resources in the frequency domain in the wireless communication. In addition, control related to HARQ control can be efficiently performed.

[0185] In addition, according to an embodiment of the present invention, a communication method performed by a terminal is provided. The communication method includes: expecting that, in non-contiguous frequency resources formed by a plurality of contiguous frequency resources, retransmission control processes are to be controlled for each of the non-contiguous frequency resources, and expecting that numbers for the retransmission control processes are to be defined in the non-contiguous frequency resources or expecting that numbers that are associated with the contiguous frequency resources are to be defined in the non-contiguous frequency resources; and transmitting terminal capability including a maximum number of the retransmission control processes in the non-contiguous frequency resources to a base station.

[0186] According to the above-described configuration, transmission and reception of data can be performed by using non-contiguous frequency resources in the frequency domain in the wireless communication. In addition, control related to HARQ control can be efficiently performed.

(Supplement of embodiment)

[0187] As described above, one or more embodiments have been described. The present invention is not limited to the above embodiments. A person skilled in the art should understand that there are various modifications, variations, alternatives, replacements, etc., of the embodiments. In order to facilitate understanding of the present invention, specific values have been used in the description. However, unless otherwise specified, those values are merely examples and other appropriate values may be used. The division of the described items may not be essential to the present invention. The things that have been described in two or more items may be used in a combination if necessary, and the thing that has been described in one item may be appropriately applied to another item (as long as there is no contradiction). Boundaries of functional units or processing units in the functional block diagrams do not necessarily correspond to the boundaries of physical parts. Operations of multiple functional units may be physically performed by a single part, or an operation of a single functional unit may be physically performed by multiple parts. The order of sequences and flowcharts described related to an embodiment of the present invention may be changed as long as there is no contradiction. For the sake of description convenience, the base station 10 and the terminal 20 have been described by using functional block diagrams. However, the apparatuses may be realized by hardware, software, or a combination of hardware and software. The software executed by a processor included in the base station 10 according to an embodiment of the present invention and the software executed by a processor included in the terminal 20 according to an embodiment of the present invention may each be stored in a random access memory (RAM), a flash memory, a read only memory (ROM), an EPROM, an EEPROM, a register, a hard disk (HDD), a removable disk, a CD-ROM, a database, a server, or any other appropriate recording medium.

[0188] In addition, notification of information is by no means limited to the aspects/embodiments described in the present disclosure, and other methods may be used as well. For example, notification of information may be implemented by using physical layer signaling (for example, downlink control information (DCI), uplink control information (UCI)), higher layer signaling (for example, radio resource control (RRC) signaling, medium access control (MAC) signaling), broadcast information (master information block (MIB), system information block (SIB)), and other signals or combinations thereof. Also, RRC signaling may be referred to as an "RRC message," and can be, for example, an RRC connection setup message, an RRC connection reconfiguration message, and so on.

[0189] Each aspect/embodiment described in the present disclosure may be applied to at least one of a system using LTE (Long Term Evolution), LTE-A (LTE-Advanced), SUPER 3G, IMT-Advanced, 4G (4th generation mobile communication system), 5G (5th generation mobile communication system), FRA (Future Radio Access), NR (new Radio), W-CDMA (registered trademark), GSM (registered trademark), CDMA2000, UMB (Ultra Mobile Broadband), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.20, UWB (Ultra-WideBand), Bluetooth (registered trademark), and other appropriate systems, or a next generation system enhanced therefrom. In addition, a plurality of systems may be combined (for example, a combination of: at least one of LTE or LTE-A; 5G, and the like) to be applied.

[0190] The order of processes, sequences, flowcharts, and so on that have been used to describe the aspects/embodiments in the present specification may be re-ordered as long as inconsistencies do not arise. For example, although various methods have been illustrated in the present disclosure with various components of steps in exemplary orders, the specific orders that are illustrated herein are by no means limiting.

[0191] Operations which have been described in the present specification to be performed by a base station 10 may, in some cases, be performed by an upper node of the base station 10. In a network including one or a plurality of network nodes with base stations 10, it is clear that various operations that are performed to communicate with terminals 20 can be performed by base stations 10, one or more network nodes (for example, Mobility Management Entities (MMEs), Serving-Gateways (S-GWs), and so on may be possible, but these are not limiting) other than base stations 10, or combinations of these. According to the above, a case is described in which there is a single network node other than the base station 10. However, a combination of multiple other network nodes may be considered (e.g., MME and S-GW).

[0192] The information or signals described in this disclosure may be output from a higher layer (or lower layer) to a lower layer (or higher layer). The information or signals may be input or output through multiple network nodes.

[0193] The input or output information may be stored in a specific location (e.g., memory) or managed using management tables. The input or output information may be overwritten, updated, or added. The information that has been output may be deleted. The information that has been input may be transmitted to another apparatus.

[0194] A decision or a determination in the present disclosure may be implemented by a value (0 or 1) represented by one bit, by a Boolean value (true or false), or by comparison of numerical values (e.g., comparison with a predetermined value).

[0195] Software should be broadly interpreted to mean, whether referred to as software, firmware, middle-ware, microcode, hardware description language, or any other name, instructions, instruction sets, codes, code segments, program codes, programs, subprograms, software modules, applications, software applications, software packages, routines, subroutines, objects, executable files, executable threads, procedures, functions, and the like.

[0196] Further, software, instructions, information, and the like may be transmitted and received via a transmission medium. For example, in the case where software is transmitted from a website, server, or other remote source using at least one of wired line technologies (such as coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), etc.) or wireless technologies (infrared, microwave, etc.), at least one of these wired line technologies or wireless technologies is included within the definition of the transmission medium.

[0197] Information, a signal, or the like, described in the present specification may be represented by using any one of various different technologies. For example, data, an instruction, a command, information, a signal, a bit, a symbol, a chip, or the like, described throughout the present application, may be represented by a voltage, an electric current, electromagnetic waves, magnetic fields, a magnetic particle, optical fields, a photon, or a combination thereof.

[0198] It should be noted that a term used in the present specification and/or a term required for understanding of the present specification may be replaced by a term having the same or similar meaning. For example, a channel and/or a symbol may be a signal (signaling). Further, a signal may be a message. Further, the component carrier (CC) may be referred to as a carrier frequency, cell, frequency carrier, or the like.

[0199] As used in the present disclosure, the terms "system" and "network" are used interchangeably.

[0200] Further, the information, parameters, and the like, described in the present disclosure may be expressed using absolute values, relative values from predetermined values, or they may be expressed using corresponding different information. For example, a radio resource may be what is indicated by an index.

[0201] The names used for the parameters described above are not used as limitations. Further, the mathematical equations using these parameters may differ from those explicitly disclosed in the present disclosure. Because various channels (e.g., PUCCH, PDCCH, or the like) and information elements may be identified by any suitable names, the various names assigned to these various channels and information elements are not used as limitations.

[0202] In the present disclosure, the terms "Base Station (BS)", "Radio Base Station", "Base Station Apparatus", "Fixed Station", "NodeB", "eNodeB (eNB)", "gNodeB (gNB)", "Access Point", "Transmission Point", "Reception Point", "Transmission/Reception Point", "Cell", "Sector", "Cell Group", "Carrier", "Component Carrier", and the like, may be used interchangeably. The base station may be referred to as the terms such as a "macro cell," a "small cell," a "femto cell," a "pico cell," and so on.

[0203] A base station can accommodate one or a plurality of (for example, three) cells. When a base station supports a plurality of cells, the entire coverage area of the base station can be partitioned into multiple smaller areas, and each smaller area can provide communication services through base station subsystems (for example, indoor small base stations (Remote Radio Heads (RRHs))).Services with higher reliability may be provided by the NTN. The term "cell" or "sector" refers to part of or the entire coverage area of at least one of a base station or a base station subsystem that provides communication services within this coverage.

[0204] In the present disclosure, transmitting information to the terminal by the base station may be referred to as instructing the terminal to perform any control and/or operation based on the information by the base station.

[0205] In the present disclosure, terms such as "mobile station (MS)", "user terminal", "user equipment (UE)", "terminal", and the like, may be used interchangeably.

[0206] A mobile station may be referred to as a "subscriber station," "mobile unit," "subscriber unit," "wireless unit," "remote unit," "mobile device," "wireless device," "wireless communication device," "remote device," "mobile subscriber station," "access terminal," "mobile terminal," "wireless terminal," "remote terminal," "handset," "user agent," "mobile client," "client," or some other appropriate terms in some cases.

[0207] At least one of a base station or a mobile station may be referred to as a "transmitting apparatus," a "receiving apparatus," a "radio communication apparatus," and so on. Note that at least one of a base station or a mobile station may be a device mounted on a moving object or a moving object itself, and so on. The mobile station is an object that can move, and the moving speed can be any speed. In addition, a mobile station that is not moving is also included. Examples of the moving object include, but are not limited to, a vehicle, a transport vehicle, an automobile, a motorcycle, a bicycle, a connected car, a loading shovel, a bulldozer, a wheel loader, a dump truck, a fork lift, a train, a bus, a trolley, a rickshaw, a ship and other watercraft, an airplane, a rocket, a satellite, a drone (registered trademark), a multicopter, a quadcopter, a balloon, and an object mounted on any of these. The moving object may be a moving object that autonomously travels based on a direction for moving. The moving object may be a vehicle (for example, a car, an airplane, and the like), may be a moving object which moves unmanned (for example, a drone, an automatic operation car, and the like), or may be a robot (a manned type or unmanned type). Note that at least one of a base station or a mobile station also includes an apparatus which does not necessarily move during communication operation. For example, at least one of the base station or the mobile station may be an IoT (Internet of Things) device such as a sensor.

[0208] Furthermore, the base station in the present disclosure may be interpreted as a user terminal. For example, each aspect/embodiment of the present disclosure may be applied to the structure in which communications between a base station and a user terminal is replaced with communications between a plurality of terminals 20 (for example, which may be referred to as Device-to-Device (D2D), Vehicle-to-Everything (V2X), and the like). In this case, terminals 20 may have the functions of the base stations 10 described above. The words such as "uplink" and "downlink" may be interpreted as the words corresponding to the terminal-to-terminal communication (for example, "sidelink"). For example, an uplink channel, a downlink channel and so on may be interpreted as a sidelink channel.

[0209] Likewise, the user terminal in the present disclosure may be interpreted as base station. In this case, the base station may have the functions of the user terminal described above.

[0210] As used herein, the term "determining" may encompass a wide variety of actions. For example, "determining" may be regarded as judging, calculating, computing, processing, deriving, investigating, looking up (search, inquiry) (e.g., looking up in a table, a database or another data structure), ascertaining and the like. Also, "determining" may be regarded as receiving (e.g., receiving information), transmitting (e.g., transmitting information), inputting, outputting, accessing (e.g., accessing data in a memory) and the like. Also, "determining" may be regarded as resolving, selecting, choosing, establishing, comparing, and the like. That is, "determining" may be regarded as a certain type of action related to determining. Further, "decision" may be read as "assuming", "expecting", or "considering", etc.

[0211] The term "connected" or "coupled" or any variation thereof means any direct or indirect connection or connection between two or more elements and may include the presence of one or more intermediate elements between the two elements "connected" or "coupled" with each other. The coupling or connection between the elements may be physical, logical, or a combination thereof. For example, "connection" may be read as "access". As used in the present disclosure, the two elements may be thought of as being "connected" or "coupled" to each other using at least one of the one or more wires, cables, or printed electrical connections and, as a number of non-limiting and non-inclusive examples, electromagnetic energy having wavelengths in the radio frequency region, the microwave region, and the light (both visible and invisible) region.

[0212] A reference signal may be abbreviated as an "RS," and may be referred to as a "pilot," and so on, depending on which standard applies.

[0213] The phrase "based on" (or "on the basis of") as used in the present disclosure does not mean "based only on" (or "only on the basis of"), unless otherwise specified. In other words, the phrase "based on" (or "on the basis of") means both "based only on" and "based at least on" ("only on the basis of" and "at least on the basis of").

[0214] Reference to elements with designations such as "first," "second," and so on as used in the present disclosure does not generally limit the quantity or order of these elements. These designations may be used in the present disclosure only for convenience, as a method for distinguishing between two or more elements. Thus, reference to the first and second elements does not imply that only two elements may be employed, or that the first element must precede the second element in some way.

[0215] "Means" included in the configuration of each of the above apparatuses may be replaced by "parts", "circuits", "devices", etc.

[0216] In the case where the terms "include", "including" and variations thereof are used in the present disclosure, these terms are intended to be comprehensive in the same way as the term "comprising". Further, the term "or" used in the present specification is not intended to be an "exclusive or".

[0217] A radio frame may be constituted of one or a plurality of periods (frames) in the time domain. Each of one or a plurality of periods (frames) constituting a radio frame may be referred to as a "subframe." Furthermore, a subframe may be constituted of one or a plurality of slots in the time domain. A subframe may be a fixed time length (for example, 1 ms) independent of numerology.

[0218] The numerology may be a communication parameter applied to at least one of transmission and reception of a certain signal or channel. The numerology may indicate at least one of a subcarrier spacing (SCS), a bandwidth, a symbol length, a cyclic prefix length, a transmission time interval (TTI), the number of symbols per TTI, a radio frame structure, a specific filtering process performed by a transceiver in the frequency domain, a specific windowing process performed by a transceiver in the time domain, and so on.

[0219] The slot may include one or more symbols in the time domain (OFDM (Orthogonal Frequency Division Multiplexing) symbols, SC-FDMA (Single Carrier Frequency Division Multiple Access) symbols, and the like). A slot may be a time unit based on numerology.

[0220] A slot may include a plurality of mini-slots. Each mini-slot may be constituted of one or a plurality of symbols in the time domain. A mini-slot may be referred to as a "sub-slot." A mini-slot may be constituted of symbols less than the number of slots. A PDSCH (or PUSCH) transmitted in a time unit larger than a mini-slot may be referred to as PDSCH (or PUSCH) mapping type A. A PDSCH (or PUSCH) transmitted using a mini-slot may be referred to as PDSCH (or PUSCH) mapping type B.

[0221] A radio frame, a subframe, a slot, a mini-slot, and a symbol all express time units in signal communication. A radio frame, a subframe, a slot, a mini-slot, and a symbol may each be called by other applicable terms.

[0222] For example, one subframe may be referred to as a transmission time interval, "TTI," a plurality of consecutive subframes may be referred to as a "TTI," or one slot or one mini-slot may be referred to as a "TTI." In other words, at least one of a subframe or a TTI may be a subframe (1 ms) in the conventional LTE, may be a period shorter than 1 ms (for example, 1 to 13 symbols), or may be a period longer than 1 ms. It is to be noted that the unit representing TTI may be referred to as a slot, a mini-slot, or the like, instead of a subframe.

[0223] Here, a TTI refers to the minimum time unit of scheduling in radio communication, for example. For example, in LTE systems, a base station performs, for each terminal 20, scheduling of allocating radio resources (such as a frequency bandwidth and transmission power that can be used by each terminal 20) in TTI units. It is to be noted that the definition of the TTI is not limited to the above-described definition.

[0224] The TTI may be a transmission time unit for channel-encoded data packets (transport blocks), code blocks, codewords, or the like, or may be a unit of processing in scheduling, link adaptation, or the like. It is to be noted that, when a TTI is provided, a time period (for example, the number of symbols) to which transport blocks, code blocks, codewords, or the like are actually mapped may be shorter than the TTI.

[0225] It is to be noted that, in a case where one slot or one mini-slot is referred to as a TTI, one or more TTIs (that is, one or more slots or one or more mini-slots) may be the minimum time unit of scheduling. Furthermore, the number of slots (the number of mini-slots) constituting the minimum time unit of the scheduling may be controlled.

[0226] A TTI having a time length of 1 ms may be referred to as a normal TTI (TTI in LTE Rel. 8 to Rel. 12), a long TTI, a normal subframe, a long subframe, a slot, or the like. A TTI that is shorter than a normal TTI may be referred to as a "shortened TTI," a "short TTI," a "partial or fractional TTI," a "shortened subframe," a "short subframe," a "mini-slot," a "sub-slot," a "slot" and so on.

[0227] It is to be noted that a long TTI (for example, a normal TTI, a subframe, or the like) may be interpreted as a TTI having a time length exceeding 1 ms, and a short TTI (for example, a shortened TTI or the like) may be interpreted as a TTI having a TTI length shorter than the TTI length of a long TTI and having a TTI length equal to or longer than 1 ms.

[0228] A resource block (RB) is the unit of resource allocation in the time domain and the frequency domain, and may include one or a plurality of consecutive subcarriers in the frequency domain. The number of subcarriers included in an RB may be the same regardless of the numerology, and may be 12, for example. The number of subcarriers included in an RB may be determined based on the numerology.

[0229] In addition, an RB may include one or a plurality of symbols in the time domain, and may have a length of one slot, one mini-slot, one subframe, or one TTI. One TTI, one subframe, and the like, may each be constituted of one or a plurality of resource blocks.

[0230] Note that one or a plurality of RBs may be referred to as a "physical resource block (Physical RB (PRB))," a "sub-carrier group (SCG)," a "resource element group (REG),"a "PRB pair," an "RB pair" and so on.

[0231] Furthermore, a resource block may be constituted of one or a plurality of resource elements (REs). For example, one RE may correspond to a radio resource area including one subcarrier and one symbol.

[0232] A bandwidth part (BWP) (which may be also referred to as a fractional bandwidth, and so on) may represent a subset of contiguous common resource blocks (common RBs) for certain numerology in a certain carrier. Here, a common RB may be identified by an RB index based on the common reference point of the carrier. PRBs may be defined by a certain BWP and may be numbered in the BWP.

[0233] A BWP may include a BWP for UL (UL BWP) and a BWP for DL (DL BWP). One or a plurality of BWPs may be configured in one carrier for UE.

[0234] At least one of configured BWPs may be active, and the UE is not required to expect to transmit/receive a certain signal/channel outside the active BWP. It is to be noted that that a "cell", a "carrier", or the like, in the present disclosure may be interpreted as a "BWP".

[0235] Note that the above-described structures of radio frames, subframes, slots, mini-slots, symbols, and so on are merely examples. For example, structures such as the number of subframes included in a radio frame, the number of slots per subframe or radio frame, the number of mini-slots included in a slot, the numbers of symbols and RBs included in a slot or a mini-slot, the number of subcarriers included in an RB, the number of symbols in a TTI, the symbol length, the cyclic prefix (CP) length, and so on can be variously changed.

[0236] In the present disclosure, where an article is added by translation, for example "a", "an", and "the", the disclosure may include that the noun following these articles is plural.

[0237] In this disclosure, the term "A and B are different" may mean "A and B are different from each other." It should be noted that the term "A and B are different" may mean "A and B are different from C." Terms such as "separated" or "combined" may be interpreted in the same way as the above-described "different".

[0238] An aspect/embodiment described in the present specification may be used independently, may be used in combination, or may be used by switching according to operations. Further, notification (transmission/reporting) of predetermined information (e.g., notification (transmission/reporting) of "X") is not limited to an explicit notification (transmission/reporting), and may be performed by an implicit notification (transmission/reporting) (e.g., by not performing notification (transmission/reporting) of the predetermined information).

[0239] As described above, the present invention has been described in detail. It is apparent to a person skilled in the art that the present invention is not limited to one or more embodiments of the present invention described in the present specification. Modifications, alternatives, replacements, etc., of the present invention may be possible without departing from the subject matter and the scope of the present invention defined by the descriptions of claims. Therefore, the descriptions of the present specification are for illustrative purposes only, and are not intended to be limitations to the present invention.

DESCRIPTION OF THE REFERENCE NUMERALS

[0240] 

10 Base station

110 Transmission unit

120 Reception unit

130 Configuration unit

140 Control unit

20 Terminal

210 Transmission unit

220 Reception unit

230 Configuration unit

240 Control unit

1001 Processor

1002 Memory

1003 Storage

1004 Communication apparatus

1005 Input apparatus

1006 Output apparatus

Claims

1. A terminal comprising:

a control unit configured to expect that, in non-contiguous frequency resources formed by a plurality of contiguous frequency resources, retransmission control processes are to be controlled for each of the non-contiguous frequency resources, and expect that numbers for the retransmission control processes are to be defined in the non-contiguous frequency resources or expect that numbers that are associated with the contiguous frequency resources are to be defined in the non-contiguous frequency resources; and

a transmission unit configured to transmit terminal capability including a maximum number of the retransmission control processes in the non-contiguous frequency resources to a base station.

2. A terminal comprising:

a control unit configured to expect that, in non-contiguous frequency resources formed by a plurality of contiguous frequency resources, retransmission control processes are to be controlled for each of the contiguous frequency resources, and expect that numbers for the retransmission control processes are to be defined in the non-contiguous frequency resources or expect that numbers that are associated with the contiguous frequency resources are to be defined in the non-contiguous frequency resources; and

a transmission unit configured to transmit terminal capability including a maximum number of the retransmission control processes in the contiguous frequency resources to a base station.

3. The terminal as claimed in claim 1 or claim 2, further comprising:
a reception unit configured to, in a case where a plurality of contiguous frequency resources are used in data transmissions corresponding to the retransmission control processes, receive a minimum value of indexes of the plurality of contiguous frequency resources from the base station.

4. A terminal comprising:

a control unit configured to, in non-contiguous frequency resources formed by a plurality of contiguous frequency resources, group a plurality of the contiguous frequency resources into a plurality of groups; and

a transmission unit configured to perform data transmissions by using different methods for data transmission using the plurality of the contiguous frequency resources within a group and data transmission using the contiguous frequency resources in a plurality of different groups.

5. A base station comprising:

a control unit configured to expect that, in non-contiguous frequency resources formed by a plurality of contiguous frequency resources, retransmission control processes are to be controlled for each of the non-contiguous frequency resources, and expect that numbers for the retransmission control processes are to be defined in the non-contiguous frequency resources or expect that numbers that are associated with the contiguous frequency resources are to be defined in the non-contiguous frequency resources; and

a reception unit configured to receive terminal capability including a maximum number of the retransmission control processes in the non-contiguous frequency resources from a terminal.

6. A communication method performed by a terminal, the communication method comprising:

expecting that, in non-contiguous frequency resources formed by a plurality of contiguous frequency resources, retransmission control processes are to be controlled for each of the non-contiguous frequency resources, and expecting that numbers for the retransmission control processes are to be defined in the non-contiguous frequency resources or expecting that numbers that are associated with the contiguous frequency resources are to be defined in the non-contiguous frequency resources; and

transmitting terminal capability including a maximum number of the retransmission control processes in the non-contiguous frequency resources to a base station.

Drawing